US3630087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Summation gauge
Assignee: SMITH DENIS Ltd
•
Filing: 1970-02-12
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Granted: 1971-12-28
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Expires: 1990-02-12
Abstract
Abstract A summation gauge which gives the sum, and/or the mean, of two fluid pressures which are applied respectively to two Bourdon tubes. The moving ends of these tubes are connected to opposite ends of a balance beam which, at a central point in its length, is connected to a gauge quadrant. In an elaboration of this gauge, for giving the sum, and/or the mean, of four separate pressures, the Bourdon tubes and their beams are duplicated. The two beams are connected, each at a central point in its length, to the opposite ends respectively of a main balance beam which is connected, at a central point in its length, to the quadrant.
Inventors
- 👤 Colin William Ogden
- 👤 Alec Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:27
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/02; G01L7/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
160 words
A summation gauge for providing the sum or mean of two separate pressures, comprising: a. two pressure-sensitive devices for responding respectively to separately applied pressures, b. a balance beam connected to said two devices at its opposite ends and having a central fulcrum point displaceable in accordance with the sum of the two pressures, c. indicating means responsive to said sum, and d. an operating connection between said fulcrum point and indicating means for transmitting said displacement to the indicating means, e. whereby upon response of said devices to separately applied pressures the displacement of said fulcrum point is proportional to the sum of said pressures and is transmitted to the indicating means, f. a pin-and-slot connection between each said device and the associated end of the beam for permitting Relative adjustment of the beam endwise, g. a spring extending between each device and the associated end of the beam which springs act in opposite directions lengthwise of the beam.
Claim 2
Dependent Claim
160 words
A summation gauge for providing the sum or mean of two separate pressures, comprising: a. two pressure-sensitive devices for responding respectively to separately applied pressures, b. a balance beam connected to said two devices at its opposite ends and having a central fulcrum point displaceable in accordance with the sum of the two pressures, c. indicating means responsive to said sum, and d. an operating connection between said fulcrum point and indicating means for transmitting said displacement to the indicating means, e. whereby upon response of said devices to separately applied pressures the displacement of said fulcrum point is proportional to the sum of said pressures and is transmitted to the indicating means, f. a pin-and-slot connection between each said device and the associated end of the beam for permitting Relative adjustment of the beam endwise, g. a spring extending between each device and the associated end of the beam which springs act in opposite directions lengthwise of the beam.
Claim 3
Dependent Claim
38 words
A gauge according to claim 1, wherein the indicating means comprises a rock arm for movement by the balance beam to actuate said indicating means, and the operating connection extends between said fulcrum point and the rock arm.
Claim 4
Dependent Claim
22 words
A gauge according to claim 1, wherein the devices are Bourdon tubes mounted in tandem and both curved in the same direction.
Claim 5
Dependent Claim
32 words
A gauge according to claim 1, having adjustment means for adjusting the position of at least one of the devices, and the beam, in the direction of the length of the latter.
Claim 6
Dependent Claim
47 words
A gauge according to claim 1, wherein each pin-and-slot connection comprises a slot extending lengthwise of the beam, and a pin extending through the slot and fixed to the moving end of the tube, said spring biassing the pin along the slot away from the fulcrum point.
Claim 7
Dependent Claim
90 words
A gauge according to claim 1 for providing the sum of four separate pressures, comprising two pairs of the said pressure-sensitive devices for responding to four separately applied pressures, an aforesaid balance beam for each pair of devices, each of which beams is connected at its opposite ends to the devices of the appropriate pair, a main balance beam, connections between central fulcrum points of the first beam and opposite ends of the main beam, and a connection between a central point of the main beam and the indicating means.
Claim 8
Dependent Claim
26 words
A gauge according to claim 6, having the two first said beams extending in the same direction and having the main balance beam parallel to them.
Claim 9
Dependent Claim
29 words
A gauge according to claim 6, having springs connected to the ends of the main beam and urging the latter in opposite directions, and means for adjusting the springs.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |